Reenforced plaster board



REENFORCED FLASTER BOARD Filed July 24.

A T TURA/EVS.

v dueto strains Chipping,

I-to prevent such damage and injury. 'reenforeementshould be in alldirections,

Patented Oct -6, 192,5.

JOHN sonumlcnna, estos ANGELES, CALIFORNIA,

animroncan rms'rim Bosnia.'

To all w'hova it may concern:

Be it known that I, JOHN Soiiuiiacnan,

a citizen of the United States, and resident of Los Angeles, in thecounty of Los Angeles,

State of California, have invented new and useful Improvements inReenforced Plaster Board, of which the following isa specification.'

This invention relates to a reenfor'ced plaster boa-rdv or the likeformed of a cementitious core covered by a pliable sheet. Such productsare subected to rough usage in Y -manufacture, andlh .tation and duringinstallation in buil ing 5 andling during trans orstructures. The edgesof such board' are especiallysusceptibleto damage and injury. lacedthereon, resulting in crac 'ng and crushing. Reenforoenient .of theedges is desirable in cdei;

t uc

should not detract from the resiliency 'of the jboard, should not add toits weight, or niaterially chan e the constituent parts of the boa-rd.Furt ermore, the character of the reenforceme-nt should be such as tomake the board economical to manufacture. -Anotlier desirable featureto' be attained is a reenforcement producing with lthe otherconstituents a unitary structure` The primary object of this inventionis the provision of a reenforced plaster board or the like. having theaforementioned characteristics.

These objects together with other objects and correspondingaccomplishments areobtained by means of the embodiment. of my inventionillustrated in the accompanying drawing, in which:

Fig. 1 is a pers ective view of a fragment of plaster board ormed inaccordance with my invention; and Fig. 2 is a plan view.

Referring more particularly to the drawing, the plaster board comprisesa cementtious core 3 preferabl plaster mixture and.p iable coveringsheets 4 and 5 referably formed of'L paper. The paper an plaster is ofsuch character that theyr cohere and are firmly .bound together.

f5 Tl'lis may be accomplished by means nowv '50 well known in the art.Interposed in the edge of the board between the covering sheet-s is areenforcement strip 6. This reenforcement strip is preferably of thesame material as the covering sheets and is embedded lin the plasterbody.

is corra preferab y from the upper covering sheet to' sheet boundthereto,

--liody and bound thereto, said str1 'ing the length of said board andorming a lthe .undulations formed of gypsum The reenforcement stripYAppunti@v med my 24, 1924. senti' no. 127,861. I

ted and the undnlations extend the lower covering sheet.

The finished product is provided with reness of the board as well asalong the le l1' of the board.- The reenforcement is so.4 xstributedthat the edge is stron siliency of. the board is not detractedLfrom turechangedv The character ofthe 'construction itself. toeasycontinuousmanufacture cada` scribedin a copendin'gf-application forVmethod of formingplaster board'- Serial No. 727,868, filed Ju1y24,192i.-- 1

, .What I claim is:

1. A reenforced plaster board or the llike comprising acementitiousbody, a covering gated strip embeddedin the edge of saidbodv andbound thereto, said strip 'extending the 'length of said boardand forming a mar-A x ginal reenforceinent.

2. A r'eenforced plaster board'or thelike comprising a oementitiousbody, a covering sheet'bound ated strip embedded in au edgeextendmarginal reenforcement thereof extending substantially the fullthickness of said bod 3.' A ree-nforced plaster board or lthe likecomprising a cementitious body disposed be- V enforcementin directionsacross the thick.

cned' inv every direction. Itis obvious t atthe-Zrei Gf nor itsweightadded to or its.-unitaryetruejl and a narrow corrathereto, and a narrow,corraof said aff tween covering sheets and bound thereto, and' a narrowcorrugated'stri embedded inthe edge of and bound to sai body andextending the length. of lsaid board so as to forniv a marginalreenforcemlent.

4. A reenforced plaster board or the f comprising covering'sheets, acementitious body disposed between said covering sheets and boundthereto, and `a narrow corrugat strip embedded in the edge of and boundto said body, thegpndulations of said stripextending substa ially fromone-covering sheet to the other, said strip extending-the go' length ofsaid board and forming-.a marginal reenforcement.

' In witness that I claim the fore ing I have hereunto subscribed .myname is 15th day oJiily, 1924. I

JOHN SCHU'MCHER.-

